public TRes SendMessage <TReq, TRes>(EntityIdentifier entityId, TReq message) where TReq : RequestMessage <TRes> where TRes : ResponseMessage
{
if (!_messageHandlers.TryGetValue(message.GetType(), out var handlerSubs))
{
return(null);
}
var allComponents = GetAllComponents(entityId);
var allComponentTypes = new HashSet <Type>(allComponents.Select(c => c.GetType()));
var entityAssemblage = new Assemblage(allComponentTypes);
if (!_handlerChainExecutorCache.TryGetValue(message.GetType(), out var executor))
{
var method = typeof(Engine).GetMethod("ExecuteHandlerChain", BindingFlags.NonPublic | BindingFlags.Static);
executor = (Func <List <Tuple <AssemblageFilter, Delegate> >, int, object, EntityIdentifier, Assemblage, object>)method.MakeGenericMethod(typeof(TReq), typeof(TRes)).CreateDelegate(typeof(Func <List <Tuple <AssemblageFilter, Delegate> >, int, object, EntityIdentifier, Assemblage, object>));
_handlerChainExecutorCache.Add(message.GetType(), executor);
}
return((TRes)executor(handlerSubs, 0, message, entityId, entityAssemblage));
}
public AssemblageFilter(IEnumerable <Type> componentTypes)
{
_filter = new Assemblage(componentTypes);
}
public bool IsMatch(Assemblage assemblage)
{
return(_filter.IsSubsetOf(assemblage));
}
public bool IsSubsetOf(Assemblage assemblage)
{
return(_types.IsSubsetOf(assemblage._types));
}
private static TRes ExecuteHandlerChain <TReq, TRes>(List <Tuple <AssemblageFilter, Delegate> > handlers, int index, object message, EntityIdentifier entityId, Assemblage entityAssemblage) where TReq : RequestMessage <TRes> where TRes : ResponseMessage
{
for (; index < handlers.Count; index++)
{
if (handlers[index].Item1.IsMatch(entityAssemblage))
{
return(((Func <TReq, EntityIdentifier, Func <TReq, EntityIdentifier, TRes>, TRes>)handlers[index].Item2)((TReq)message, entityId, (m, e) => ExecuteHandlerChain <TReq, TRes>(handlers, index + 1, (TReq)message, entityId, entityAssemblage)));
}
}
return(null);
}
